fossilizing
Webster's Dictionary (GCIDE)
Fossilize \Fos"sil*ize\, v. t. [imp. & p. p. Fossilized; p. pr. & vb. n. Fossilizing.] [Cf. F. fossiliser.]
1.To convert into a fossil; to petrify; as, to fossilize bones or wood. [1913 Webster]
2.To cause to become antiquated, rigid, or fixed, as by fossilization; to mummify; to deaden. [1913 Webster]
Ten layers of birthdays on a woman's head Are apt to fossilize her girlish mirth.— Mrs. Browning.[1913 Webster]